Text fields with values set by drupalgap_field_info_instances_add_to_form are empty

All my text fields with values grabbed with drupalgap_field_info_instances_add_to_form are displaying as empty. Let me try to explain this bug (?) I'm experiencing.

This is on a custom entity form so not sure if it's true with other forms but I have fields on my custom entity.

The following in drupalgap_field_info_instances_add_to_form sets the value:

                form.elements[name][language][delta] = {
                  'value': default_value
                };

Then in _drupalgap_form_render_element the following sets the attribute value:

       // If there wasn't a default value provided, set one. Then set the
        // default value into the variables' attributes.
        if (!item.default_value) { item.default_value = ''; }
        variables.attributes.value = item.default_value;

This leads to no value being set in my text fields.

Should the fix be adding a default value to drupalgap_field_info_instances_add_to_form? Might work on this.